Ruffling mechanisms for sewing machines



Jan. 30, 1962 H. HACKLANDER RUFFLING MECHANISMS FOR SEWING MACHINES 3 Sheets-Sheet 1 Filed July 15, 1957 01 0 mm m a H m G H m M w mm m Jan. 30, 1962 H. HACKLANDER RUFFLING MECHANISMS FOR SEWING MACHINES 3 Sheets-Sheet 2 Filed July 15, 1957 ww gm IN VEN TOR. 55 Hans Hack/under w z a 2 ATTORNQY Jan. 30, 1962 H. HACKLANDER RUFFLING MECHANISMS FOR SEWING MACHINES f 3 .8 Y t mm we 6 N 6 Na on S Vk T k m T a .A m s 0/ 3 m mQmH W B 7 5 w 5, 0% 1 0 m 1% u d mm e E U N. F H

Sfildfldd Patented Jan. 30, 1962 ice 3,618,744 RUFFLHIG MECHANISMS FGR SEWTNG MAQHTNES Hans Hacklander, Warren Township, NJL, assignor to The Singer Manufacturing Company, Elizabeth, N..l.,

a corporation of New Jersey Filed July 15, 1957, Ser. No. 671,913 15 Claims. (Cl. 112-132) The present invention relates to sewing machines and particularly to a ruffling mechanism for sewing machines.

The object of the present invention is to provide a new and improved ruifling mechanism for sewing machines, which mechanism is adapted to perform a wide variety of ruiiling operations and toward this end, is adjustable and includes a separate independently adjustable ruffiing blade for performing differential ruffiing, which adjustments canbe effected during the operation of the machine. At the same time, it is an object of this invention to provide such a ruiiling mechanism that is economical, easy to operate and is efiicient, dependable and durable at the high speeds of operation common in modern industrial sewing machines.

It is a further object of this invention to provide a ruflling mechanism in accordance with the above objects that can be incorporated in a universal industrial sewing machine. In my prior patent application Serial No. 609,836, filed Sept. 14, 1956, now Patent No. 2,976,831, granted March 28, 1961, there is disclosed and claimed a sewing machine wherein there is combined an angled bracket arm having the head disposed forwardly relatively to the standard for the purpose of improving visibil ity at the point of stitch formation and facilitating manipulation of the work, and a needle bar drive of the rock lever type, which is a superior construction for use in high speed machines, as well as a pair of selectively usable attachment shafts which are designed to drive a number of different attachment mechanisms without significant modification of the machine. The attachment shafts, in accordance with the invention disclosed and claimed in my above noted application Serial No. 609,836, are arranged longitudinally of the bracket arm and horizontally in vertically spaced parallel relationship, and are parallel to the bed shaft, which is the main shaft of the machine and therefore are angled relatively to the longitudinal axis of the bracket arm being disposed toward the front of the bracket arm at the standard end and adjacent to the rear of the bracket arm at the head end. Accordingly, it is an object of this invention to provide a rufilng mechanism which is designed to be actuated and controlled by the same two attachment shafts and is thus adapted to be incorporated in the machine forming the subject matter of my prior application and thereby enhancing the universality of that machine by increasing the applications or specific operations for which that machine is suited.

Having in mind the above and other objects that will be evident from an understanding of this disclosure, the invention comprises the devices, combinations and arrangements of parts as illustrated in the presently preferred embodiment of the invention which is hereinafter set forth in such detail as to enable those skilled in the art readily to understand the function, operation, construction and advantages of it when read in conjunction with the accompanying drawings in which:

FIG. 1 is a fragmentary vertical sectional view taken longitudinally of a sewing machine embodying the present invention.

FIG. 2 is a horizontal sectional view taken substantially on the line 22 of FIG. 1.

FIG. 3 is a head end elevational view of the sewing machine of FIG. 1 with the face plate removed.

FIG. 4 is a fragmentary front elevational view of the head of the sewing machine of FIG. 1 with the cover plate in section.

FIG. 5 is a horizontal sectional view taken substantially on the line 55 of FIG. 3.

As noted above, the milling mechanism in accordance with the present invention is designed for and is herein disclosed as applied to the sewing machine forming the subject matter of my prior application Serial No. 609,836. This machine includes a bed 1 having a vertically disposed hollow standard 2 rising from the one end thereof, the standard 2 carrying a bracket arm 3 overhanging the bed 1 and terminating in a head 4. The open end of the head 4 is closed by a face plate 5 while the open top of the bracket arm 3 is closed by a cover plate 6. With reference to FIG. 2, it will be seen that the bracket arm 3 is angled to place the head forwardly for the purpose of improving the operators visibility at the point of stitch formation and facilitating manipulation of the work.

A main shaft 7 is journaled longitudinally of the bed 1 and is provided with a belt pulley 8 by means of which power is delivered to the machine. On the main shaft 7 there is a crank 9 connected by a pitman 10 to one end of a needle bar rock lever 11 which is pivoted intermediate its ends on a pivot shaft 12 mounted transversely of the bracket arm 3. The other end of the rock lever 11 is connected to a needle bar 13 mounted vertically for endwise reciprocation in the head a. At its lower end, the needle bar 13 carries a pair of laterally spaced needles 14. To obtain an easy running construction free from binding forces, the axis of the pivot shaft 12 is disposed horizontally and at a right angle to a line connecting the ends of the rock lever 11.

There is also disclosed in the drawings elements of the presser mechanism including a pressure bar 15 mounted for endwise sliding movement in the head 4 directly behind the needle bar 13 and carrying a presser foot 16 at its lower end. In the customary manner the presser foot is designed to hold the work against a throat plate 17 mounted in the bed 1, and a feed dog 1'8. The presser foot 16 is raised from the work by a presser lifter mechanism comprising a connecting link 19 arranged longitudinally of the bracket arm 3 and connected at one end by means of a bell crank lever 26* and link 21 to a collar 22 on the presser bar and at the other end to a crank arm 23 on a presser lifter shaft 24 arranged longitudinally of the bracket arm 3 and having an operator controlled lever 25 secured thereon at the rear of the bracket arm.

The universal machine disclosed and claimed in my above noted application Serial No. 609,836 has two sets of aligned bearing bores for receiving a pair of attachment shafts. These bearing bores comprise a lower set including a bore 26 in a lug 27 at the standard end of the bracket arm 3 and a pair of bores 28 in lugs 29 at the head end of the bracket arm 3, and an upper set including a bore 30 in a lug 31 at the head end of the bracket arm 3 and a pair of bores 32 in lugs 33 at the head end of the bracket arm 3.

The axes of the lower set of bores 26 and 28 and upper set of bores 36 and 32 are arranged parallel in a vertical plane with the axis of the bores 26 and 23 passing over the hub of the rock lever 11 and the axis of the bores 36 and 32 passing under the hub of the rock lever 11. At the same time, in view of the angled bracket arm and V the fact that the shafts to be mounted in the bores are designed to be driven from the main shaft '7, the axes of the bores are parallel to the main shaft '7 in order to avoid complex driving connections. Thus, at the standard end of the machine the axes of the bores are adjacent to the front of the bracket arm 3 and at the head end, they are adjacent to the rear of the bracket arm 3. To obtain clearance for oscillation of the rock lever 11 relatively to the shafts to be mounted in the bores, the arms of the rock lever 11 are spaced laterally at the hub with the one arm disposed adjacent to the rear of the bracket arm 3 behind the intended shafts and the other arm disposed adjacent to the front of the bracket arm 3 in front of the intended shafts. This construction is disclosed and claimed in my above noted application Serial No. 609,836, to which reference may be had for a more complete understanding thereof.

When the machine is fitted with a rufiling mechanism in accordance with the present invention, an oscillating rufiler actuating shaft 34 is journaled in bearing bushings 35 and 36 in the bores 26 and 28 and a hollow outer control shaft 37 is journaled in the bores 30 and 32 while a second or inner control shaft 33 is journaled internally and coaxially of the outer control shaft 37. At the standard end of the bracket arm 3, the outer control shaft 37 extends through the bore 30 to the exterior of the frame where it has secured thereon a crank arm 39 While the inner control shaft 38 extends beyond the end of the outer control shaft 37 where it has secured thereon a crank arm 40. The arms 39 and 46 are designed to be individually connected, as by links, to separate operator-actuated control means such as foot treadles (not shown), whereby the operator can effect an adjustment in both directions of each of the control shafts 37 and 38. Oscillation is imparted to the rufiler actuating shaft 34 by a crank arm 41 secured to the shaft and connected by a pitman 42 to an adjustable eccentric 43 on the main shaft 7.

The rufiling mechanism includes a horizontal rufller shaft 44 journaled in a bracket comprising spaced lugs 45 integral with a plate 46, the bracket being releasably secured by screws 47 to a flat on the lower front part of the head 4, and the shaft 44 being arranged parallel to the rufiler actuating shaft 34. Secured to the rufller shaft 44 between the lugs 45 is the hub 48 of a rufiler blade carrier arm 49 of a main rufl'ler, designated generally 50, while an auxiliary or differential rufiler, designated generally 51, has a miller blade carrier arm 52 including a hub 53 that is loosely journaled on the end of the ruffier shaft 44. Each of the rufilers is similar in that they include a lever 54 pivoted intermediate its ends on a pivot pin 55 secured by a screw 56 in a bore in the end of the arms 49 and 52 and having a ruflling blade 57 secured by a screw 58 to one arm of the lever 54. In each of the rufllers, the other arm of the lever 54 is formed with an end 59 that is engaged by one end of a leaf spring 60, the other ends of the springs 60 being secured to the hubs 48 and 53 of thecarrier arms "49 and 52. Each of the springs 60 is engaged at an intermediate point on the face opposite from the face in engagement with the lever end 59 and the hub 48 or 53 by an abutment screw 61 threaded through an ear 62 on the respective carrier arm 49 or 52, the screw 61 providing means for effecting an adjustment of the action of the spring 60 and being locked in adjusted position by a nut 63.

Variable oscillation is imparted to the rufiler shaft 44 and thus to the main rufi'ler 50 by a crank arm 64 secured on the end of the shaft. The free end of the crank arm 64 is bifurcated to form tines 65 having a pivot pin 66 journaled therein. The pivot pin 66 is secured by a set screw 67 in one end of a connecting link 68 mounted on the pin between the tines 65. The opposite end of the connecting link 63 is connected to a crank, designated generally 69, having a hub 70 secured as by brazing to the end of the rufller actuating shaft 34. The crank 69 includes a crank arm 71 spaced from the hub 70 and arranged normal to the axis of the shaft 34, and a laterallyextending connecting arm 72 between the crank arm 71 and hub 70. The connection between the connecting link 68 and crank 69 comprises a slot 73 in the crank arm 71 in which is mounted a slide block 74. The end of the link 68 is bifurcated, FIG. 5, to provide tines 75' and 76 which are disposed upon opposite sides of the crank arm 71, the slide block 74 and the tine 76 being apertured to receive the smooth-surfaced end 77 of a pivot screw 78 threaded through the tine 75. The amount of oscillation imparted to the main rufiler 49 will depend upon the positioning of the end of the link 68 radially relatively to the axis of the ruffier actuating shaft 34, or in other words, the positioning of the pivot screw 78 along the slot 73. To effect adjustment of the pivot screw 78 along the slot 73, there is provided a crank arm 79 secured to the end of the inner control shaft 38, which crank arm 79 is pivotally connected at its free end to the upper end of a control link 8%) that is pivotally connected at its lower end to an intermediate point on the link 68. Thus, as the inner control shaft 38 is turned by means of the crank arm 40, the connecting link 68 is pivoted about the pivot pin 66 to move the opposite end thereof relatively to the crank arm 71, thus moving the pivot screw 78 along the slot 73 to vary the positioning of the end of the link 68 radially relatively to the axis of the shaft 34 and thereby vary the oscillation imparted to the crank arm 64 and thus to the rufiler shaft 44 and main ruffler 50. When the operator-actuated crank arm 39 is depressed, the stroke of the main rufiler 50 will be decreased, and when the crank arm 39 is raised, the stroke of the main rufiier 59 will be increased.

The construction of the crank 69 is designed to provide for adjustment of the pivot screw 7 8 to a position in axial alignment with the rufller actuating shaft 34 or into a zero position in which there will be no motion imparted to the link 63. For this reason, the crank 69 is formed with the crank arm 71 spaced from the hub a distance adequate to provide clearance for the end of the link 68 when it is adjusted into this Zero position. At the same time, the connecting arm 72 is spaced outwardly from the axis of the rufiler actuating shaft 34 a distance that will permit elongating the slot 73 so that it will accommo date the slide block 74 in a position in axial alignment with the shaft 34 and also will be adequate to provide clearance for the end of the link 68 when adjusted into this zero position.

To minimize the displacement of the link 68 and the resultant actuation of the rufller shaft 44 and to avoid varying the center of the path of oscillation of the crank arm 64 as the pivot screw 73 is adjusted along the slot 73, the slot 73 is formed on an are about the axis of the pivot pin 66 taken when the crank arm 64 is in substantially the mid-point of its path of oscillation.

Oscillation is imparted to the auxiliary or differential ruffler 51 by a drive link 81 having one end journaled on the pivot pin 66 between the tines 65 at the bifurcated end of the crank arm 64. At its opposite end, the drive link 81 is pivotally connected to the free end of an anchor link 82 having a hub 83 loosely journaled on the end of the ruffler actuating shaft 34. A pivot screw 84 is mounted on the drive link 81 at a point intermediate the ends of the drive link and adjacent to the end connected to the anchor link 82. The pivot screw 84 has a smoothsurfaced shank 85 on which is loosely journaled the one end of a connecting link 86 having the other end bifurcated to provide tines 87 and 88 that embrace the opposite faces of the carrier arm 52 of the differential rufller 51. The carrier arm 52 is provided with a slot 89 in which is mounted a slide block 90, the tine 87 of the link 86 and the slide block 90 being apertured, FIG. 5, to receive the smooth-surfaced end 91 of a pivot screw 92 threaded through the tine 88. In the same manner as with the slot 73, the slot 89 is formed on an are about the pivot axis of the link connected thereto, which is the axis of the pivot screw 84 about which the connecting link 86 is pivoted.

In operation as the connecting link 68 is actuated by the crank 69 to oscillate the crank arm 64, it will also actuate the drive link 81 with the crank arm 64 serving in effect as an anchor link for the one end of the drive link 81. Actuation of the drive link 81 actuates the conncctin g link 86 which oscillates the carrier arm 52 of the differential rufiier 51 about the axis of the ruffler shaft 44. The amount of oscillation imparted to the carrier arm 52 depends upon the location of the pivotal connection of the link 86 to the carrier arm 52, which is the pivot screw 92, radially relatively to the pivotal axis of the carrier arm 52. To adjust this pivotal connection, there is provided a control link 93 connected at its lower end to an intermediate point on the connecting link 86 and at its upper end to the free end of a crank arm 94 secured on the outer control shaft 37. When the outer control shaft 37 is turned by the crank arm 40, the connecting link 86 is pivoted about its connection with the anchor link 82 to move the opposite end thereof relatively to the carrier arm, thus moving the pivot screw 91 along the slot 89.

The drive for the differential rufiler 51 is designed so that with the pivot screw 92 positioned substantially at the mid-point of the slot 89, the stroke of the differential ruffler 51 will be the same as that of the main rufiier 50.

When the end of the crank arm 40 is depressed, the end of the connecting link 36 will be raised and the stroke of the differential ruffier 51 will be less than that of the main rufiler 5t while, when the end of the crank arm 4t) is raised, the end of the connecting link 86 will be lowered and the stroke of the differential ruffler will be greater than that of the main ruffler 50.

In the present construction, both the main ruffler so and the differential ruffier 51 are driven by the rufiler actuating shaft 34 through the crank 69 and the connecting link 68 so that adjustment of the link 68 by turning the inner control shaft 38 will simultaneously adjust the stroke of both of the rufflers. Adjustment of the stroke of the differential ruifler 51 relatively to the stroke of the main rufiier St) is provided by turning the outer control shaft 37. Both of these adjustments can be effected during the operation of the machine.

Numerous alterations of the structure herein disclosed will suggest themselves to those skilled in the art. However, it is to be understood that the present disclosure re lates to a preferred embodiment of my invention which is for purposes of illustration only and not to be construed as a limitation of the invention. All such modifications which do not depart from the spirit of the invention are intended to be included within the scope of the appended claims.

Having thus described the nature of the invention, what I claim herein is:

1. In a sewing machine having a bed, a main shaft journaled longitudinally in said bed, a standard rising from one end of said bed, a bracket arm carried by said stand ard and terminating in a head overhanging said bed, said bracket arm being angled relatively to said main shaft to position said head forwardly of said standard with respect to said main shaft, 21 pair of vertically spaced parallel shafts comprising a miller actuating shaft and -a control shaft journaled longitudinally of said bracket arm parallel to said main shaft with one end of said shafts being disposed adjacent to the front of said standard and the other end of said shafts disposed adjacent to the rear of said head, operative connections between said main shaft and said ruffler actuating shaft for imparting oscillation to said rufiier actuating shaft upon rotation of said main shaft, a ruffler shaft journaled on said brack arm, a ruffier blade carrier arm mounted on said ruffier shaft, an adjustable connection between said ruffler actuating shaft and said ruffler shaft for imparting variable oscillation to said ruffler shaft upon oscillation of said ruffler actuating shaft, and operative connections between said adjustable connection and said control shaft for effecting adjustment thereof upon actuation of said control shaft.

2. In a sewing machine having a bed, a main shaft journaled longitudinally in said bed, a standard rising from one end of said bed, a bracket arm carried by said standard and terminating in a head overhanging said bed, said bracket arm being angled relatively to said main shaft to position said head forwardly of said standard with respect to said main shaft, stitching mechanism including a needle bar mounted in said head for endwise reciprocation, a rock lever arranged longitudinally of said bracket arm and pivotally mounted transversely of said bracket arm, a rufller actuating shaft and a control shaft journaled longitudinally of said bracket arm parallel to said main shaft with one end of said shafts being disposed adjacent to the front of the standard and the other end of said shafts disposed adjacent to the rear of the standard, said rufiier actuating shaft and said control shaft being arranged in vertically spaced relation with one of said shafts passing over the pivot axis of said rock lever and one of said shafts passing under the pivot axis of said rock lever, operative connections between said main shaft and said rufiler actuating shaft for imparting oscillation to said rufi'ler actuating shaft upon rotation of said main shaft, a ruffler shaft journaled on said bracket arm, a ruffier blade carrier arm mounted on said rufiler shaft, an adjustable connection between said rufiier actuating shaft and said rufiler shaft for imparting variable oscillation to said ruffier shaft upon oscillation of said ruffier actuating shaft, and operative connections between said adjustable connection and said control shaft for effecting adjustment thereof upon actuation of said control shaft.

3. In a sewing machine having a frame, a main ruffier blade carrier arm pivotally mounted on said frame, adjustable actuating means for imparting variable actuation to said main ruffler blade carrier arm, a differential rufller blade carrier arm pivotally mounted on said frame, and adjustable actuating means operatively connecting said differential ruffler blade carrier arm to the actuating means for said main rufiler blade carrier arm for imparting independently variable actuation to said differential ruffier blade carrier arm upon actuation of said main ruffler blade carrier arm, whereby the stroke of both of said rufiier blade carrier arms will be varied upon adjustment of said actuating means for said main rufiler blade carrier arm and the stroke of said differential ruffler blade carrier arm will be varied relatively to the stroke of said main ruffler blade carrier arm upon adjustment of the actuating means for said differential ruffler blade carrier arm.

4. In a sewing machine having a frame, a ruffler shaft journaled on said frame, a main rufller blade carrier arm secured to said ruffler shaft, adjustable actuating means for imparting variable actuation to said rufiier shaft, a differential ruffler blade carrier arm pivotally mounted on said rufiler shaft, and adjustable actuating means operatively connecting said differential ruffler blade carrier arm to the actuating means for said main ruffler blade carrier arm for imparting independently variable actuation to said differential ruffler blade carrier arm upon actuation of said main ruifier blade carrier arm whereby the stroke of both of said ruffler blade carrier arms will be varied upon adjustment of said actuating means for said main rufiler blade carrier arm and the stroke of said differential ruffier blade carrier arm will be varied relatively to the stroke of said main rufiler blade carrier arm upon adjustment of the actuating means for said differential ruffler blade carrier arm.

5. In a sewing machine having a frame, a main ruffier blade carrier arm pivotally mounted on said frame, a link operatively connected to said main rufller blade carrier arm for imparting actuation thereto upon actuation of said link, adjustable actuating means for imparting variable actuation to said link, a differential rufiier blade carrier arm pivotally mounted on said frame, and adjustable actuating means operatively connecting said differential ruffler blade carrier arm to said link for imparting independently variable actuation to said differential rufller blade carrier arm upon actuation of said link whereby the stroke of both of said rufiler blade carrier arms will be varied upon adjustment of the actuating means for said link and the stroke of said differential ruffler blade carrier arm will be varied relatively to the stroke of said main rufiler blade carrier arm upon adjustment of the actuating means for said differential ruffier blade carrier arm.

6. In a sewing machine having a frame, a main ruflier blade carrier arm pivotally mounted on said frame, a ruffier actuating shaft journaled on said frame, a crank arm on said shaft, a link, means operatively connecting one end of said link to said crank arm for adjustment radially relatively to the axis of said shaft for imparting variable actuation to said link upon actuation of said shaft, means operatively connecting said link and said main rufiler blade carrier arm for imparting actuation to the same upon actuation of said link, a differential ruffler blade carrier arm pivotally mounted on said frame, and adjustable actuating means operatively connecting said rufller blade carrier arm to said link for imparting independently variable actuation to the same upon actuation of said link whereby the stroke of both of the rufiler blade carrier arms will be varied upon adjustment of the connection between said link and said crank arm radially relative to th axis of said shaft and the stroke of said differential ruffler blade carrier arm will be varied relative to the stroke of said main rufller blade carrier arm upon adjustment of the actuating means for said differential rufller.

7. In a sewing machine having a frame, a main ruffler blade carrier arm pivotally mounted on said frame, a rufller actuating shaft journaled on said frame, a crank arm on said shaft, a link, means operatively connecting one end of said link to said crank arm for adjustment radially relatively to the axis of said shaft for imparting variable actuation to said link upon actuation of said shaft means operatively connecting said link and said main ruffier blade carrier arm for imparting actuation to the same upon actuation of said link, a differential ruffier blade carrier arm pivotally mounted on said frame, an anchor link pivotally mounted on said shaft, a drive link operatively connected to said first-mentioned link and to the free end of said anchor link, a connecting link peratively connected to said drive link and means for operatively connecting said connecting link to said differential rufiier blade carrier arm for adjustment radially relatively to the pivot axis thereof for imparting variable actuation to said differential rufiler blade carrier arm upon actuation of said first-mentioned link whereby the stroke of both of said ruffier blade carrier arms will be varied upon adjustment of said actuating means for said link and the stroke of said differential ruffier blade carrier arm will be varied relative to the stroke of said main rufller blade carrier arm upon adjustment of the connection between said connecting link and said differential ruffler blade carrier arm radially relatively to the pivot axis of said differential ruffier blade carrier arm.

8. In a sewing machine having a frame, a main rufiler blade carrier arm pivotally mounted on said frame, a link operatively connected to said main rufller blade carrier arm for imparting actuation thereto upon actuation of said link, adjustable actuating means for imparting variable actuation to said link, a differential ruffler blade carrier arm pivotally mounted on said frame, an anchor link pivotally mounted in said frame, a drive link operatively connected to said first-mentioned link and to the free end of said anchor link, a connecting link operatively connected to said drive link and means for operatively connecting said connecting link to said differential ruffler blade carrier arm for adjustment radially relatively to the pivot axis thereof for imparting variable actuation to said differential ruffier blade carrier arm upon actuation of said first-mentioned link whereby the stroke of both of said ruffier blade carrier arms will be varied upon adjustment of said actuating means for said link and the stroke of said differential ruffier blade carrier arm will be varied relatively to the stroke of said main rufiier blade carrier arm upon adjustment of the connection between said connecting link and said differential ruffler blade carrier arm radially relatively to the pivot axis of said differential ruffier blade carrier arm.

9. In a sewing machine having a frame, a ruffier shaft journaled on said frame, a main ruftler blade carrier arm secured to said shaft, a ruffier actuating shaft journaled on said frame, actuating means for said shaft, a crank arm on said ruftler actuating shaft, a link, means operatively connecting said link to said crank arm for adjustment radially relatively to the axis of said shaft for imparting variable actuation to said link upon actuation of said rufiier actuating shaft, means operatively connecting said link to said main ruffler blade carrier arm for imparting actuation to said main ruffler blade carrier arm upon actuation of said link, a differential rufller blade carrier arm pivotally mounted on said ruffler shaft, an anchor link pivotally mounted on said rufller actuating shaft, a drive link operatively connected to said first-mentioned link and to the free end of said anchor link, a connecting link operatively connected to said drive link, and means for operatively connecting said connecting link to said differential ruiller blade carrier arm for adjustment radially relatively to the pivot axis thereof for imparting variable actuation to said differential ruffler blade carrier arm upon actuation of said first-mentioned link whereby the stroke of both of said ruffler blade carrier arms will be varied upon adjustment of the connection between said link and said crank arm radially relatively to the axis of said ruffler actuating shaft and the stroke of said differential ruffier blade carrier arm will be varied relative to the stroke of said main ruffier blade carrier upon adjustment of the connection between said connecting link and said differential ruffier blade carrier arm radially relatively to the axis of said ruifier shaft.

10. In a sewing machine having a frame, a main ruffier blade carrier arm pivotally mounted on said frame, adjustable actuating means for imparting variable actuation to said main ruffler blade carrier arm, a differential rulfier blade carrier arm pivotally mounted on said frame, adjustable actuating means for imparting independently adjustable actuation to said differential rutfler blade carrier arm, a first control shaft journaled on said frame, operative connections between said first control shaft and the actuating means for said main rufiler blade carrier arm for adjusting the same upon actuation of said first control shaft, a second control shaft journaled on said frame, and operative connections between said second control shaft and the actuating means for said differential rufiler blade car rier arm for adjusting the same upon actuation of said second control shaft.

11. In a sewing machine having a frame, a main rufiler blade carrier arm pivotally mounted on said frame, adjustable actuating means for imparting variable actuation to said main ruffier blade carrier arm, a differential rufller blade carrier arm pivotally mounted on said frame, adjustable actuating means for imparting independently adjustable actuation to said differential ruffler blade carrier arm, a pair of control shafts journaled on said frame, one of said controls being hollow and the other of said control shafts being journaled coaxially and internally thereof, operative connections between a first one of said control shafts and the actuating means for said main ruffler blade carrier arm for adjusting the same open actuation of the first control shaft, and operative connections between a second one of said control shafts and the actuating means for said differential ruffier blade carrier arm for adjusting the same upon actuation of said second control arm.

12. In a sewing machine having a frame, a main ruffier blade carrier arm pivotally mounted on said frame, a rufiler actuating shaft journaled on said frame, a crank arm on said rufiler actuating shaft, a first connecting link, means operatively connecting said first connecting link to said crank arm for adjustment radially relatively to the axis of said ruffier actuating shaft, means operatively connecting said first connecting link to said main rufiler blade carrier arm for imparting actuation to the same upon actuation of said first connecting link, a differential rufiier blade carrier arm pivotally mounted on said frame, a second connecting link, means operatively connecting said second connecting link to said differential ruffler blade carrier arm for adjustment radially relatively to the pivot axis of said differential rutller blade carrier arm, means operatively connecting said second connecting link to said first connecting link for imparting actuation to the same upon actuation of said first connecting link and thereby imparting variable actuation to said differential ruffler blade carrier arm, a pair of control shafts journaled in said frame, means operatively connecting one of said control shafts to said first connecting link for adjusting the connection thereof to said crank arm radially relative to the axis of said rufiier actuating shaft, and means operatively connecting the other of said control shafts to said second connecting link for adjusting the connection thereof to said differential rufller blade carrier arm radially relatively to the pivot axis of the same.

13. In a sewing machine having a frame, a main ruffler blade carrier arm pivotally mounted on said frame, a ruffler actuating shaft journaled on said frame, a crank arm on said rufiler actuating shaft, 21 first connecting link, means operatively connecting said first connecting link to said crank arm for adjustment radially relatively to the axis of said ruffier actuating shaft, means operatively connecting said first connecting link to said main ruffler blade carrier arm for imparting actuation to the same upon actuation of said first connecting link, a differential ruifier blade carrier arm pivotally mounted on said frame, a second connecting link, means operatively connecting said second connecting link to said differential ruffler blade carrier arm for adjustment radially relatively to the pivot axis of said differential rufiler blade carrier arm, means operatively connecting said second connecting link to said first connecting link for imparting actuation to the same upon actuation of said first connecting link and thereby imparting variable actuation to said differential rufller blade carrier arm, a pair of control shafts journaled in said frame, one of said control shafts being hollow and the other of said control shafts being journaled coaxially and internally thereof, means operatively con necting one of said control shafts to said first connecting link for adjusting the connection thereof to said crank arm radially relative to the axis of said ruffler actuating shaft, and means operatively connecting the other of said control shafts to said second connecting link for adjusting the connection thereof to said differential ruffler blade carrier arm radially relatively to the pivot axis of the same.

14. In a sewing machine having a bed, a main shaft journaled longitudinally in said bed, a standard rising from one end of said bed, a bracket arm carried by said standard and terminating in a head overhanging said bed, a ruffler shaft journaled on said frame, a main rufiier blade carrier arm secured to said ruffler shaft, a rufiier actuating shaft journaled longitudinally of said bracket arm, means operatively connecting said main shaft to said rufiler actuating shaft for imparting actuation to the latter, a crank arm on said ruffler actuating shaft, a first connecting link, means operatively connecting said first connectink link to said crank arm for adjustment radially relatively to the axis of said rufller actuating shaft, a differential ruffler blade carrier arm pivotally mounted on said ruffler shaft, an anchor link pivotally mounted on said rufiier actuating shaft, a drive link pivotally connected to said first connecting link and to the free end of said anchor link, a second connecting link pivotally connected at one end to said drive link, means for connecting the other end of said second connecting link to said differential rufiier blade carrier arm for adjustment radially relatively to the axis of said rufi ler shaft, a pair of control shafts journaled in said frame, one of said control shafts being hollow and the other of said control shafts being journaled coaxially and internally thereof, means operatively connecting one of said control shafts to said first connecting link for adjusting the connection thereof to said crank arm radially relatively to the axis of said ruffler actuating shaft, and means operatively connecting the other of said control shafts to said second connecting link for adjusting the connection thereof to said differential rufiier blade carrier arm radially relatively to the pivot axis of the same.

15. In a sewing machine having a frame including a bed, a standard rising from one end of said bed and a bracket arm carried by said standard and overhanging said bed and terminating in a free end, a main shaft journaled for rotation longitudinally of said bed, a seat formed on the exterior of said bracket arm adjacent to the free end thereof, a bracket mounted on and releasably secured to said seat, a rufiler shaft journaled in said bracket parallel to said main shaft and extending beyond the free end of said bracket arm, a ruffier blade carrier arm mounted on said ruffler shaft, a ruffier actuating shaft journaled for oscillation longitudinally of said bracket arm and parallel to said main shaft and extending beyond the free end of said bracket arm, operative connections extending through said standard between said main shaft and said ruffler actuating shaft for imparting oscillation to said ruffier actuating shaft upon rotation of said main shaft, operative connections between said ruffler actuating shaft and said ruffier shaft for imparting oscillation to said ruifler shaft upon oscillation of said ruffler actuating shaft comprising a crank including a hub secured to the end of said ruifler actuating shaft and a crank arm spaced from the end of said ruffler actuating shaft, said crank arm having a slot, a slide element mounted in said slot for adjustment along the same, a link having one end pivotally connected to said slide element, said crank arm and the slot therein being elongated to provide for adjustment of said slide element into a position with the axis of the pivotal connection in alignment with the axis of said ruffier actuating shaft and for adjustment radially outwardly relatively to the axis of said rufiler actuating shaft, and a crank arm secured to said rumor shaft and pivotally connected at its free end to said link.

References Cited in the file of this patent UNITED STATES PATENTS 1,296,550 Onderdonk et a1. Mar. 4, 1919 1,320,248 Le Fevre .1 Oct. 28, 1919 2,108,403 Edwards Feb. 15, 1938 2,236,308 Card Mar. 25, 1941 

